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arXiv · 1810.02331

Precise branching ratio measurements in $^{19}$Ne beta decay and fundamental tests of the weak interaction

B. M. Rebeiro·S. Triambak·P. Z. Mabika·P. Finlay·C. S. Sumithrarachchi·G. Hackman·G. C. Ball·P. E. Garrett·C. E. Svensson·D. S. Cross·R. Dunlop·A. B. Garnsworthy·R. Kshetri·J. N. Orce·M. R. Pearson·E. R. Tardiff·H. Al-Falou·R. A. E. Austin·R. Churchman·M. K. Djongolov·R. D'Entremont·C. Kierans·L. Milovanovic·S. O'Hagan·S. Reeve·S. K. L. Sjue·S. J. Williams·S. S. Ntshangase
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Abstract

We used the 8$\pi$ $\gamma$-ray spectrometer at the TRIUMF-ISAC radiocative ion beam facility to obtain high-precision branching ratios for $^{19}$Ne $\beta^+$ decay to excited states in $^{19}$F. Together with other previous work, our measurements determine the superallowed $1/2^+ \to 1/2^+$ beta branch to the ground state in $^{19}$F to be 99.9878(7)\%, which is three times more precise than known previously. The implications of these measurements for testing a variety of weak interaction symmetries are discussed briefly.

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B. M. Rebeiro, S. Triambak, P. Z. Mabika, P. Finlay, C. S. Sumithrarachchi, G. Hackman, G. C. Ball, P. E. Garrett, C. E. Svensson, D. S. Cross, R. Dunlop, A. B. Garnsworthy, R. Kshetri, J. N. Orce, M. R. Pearson, E. R. Tardiff, H. Al-Falou, R. A. E. Austin, R. Churchman, M. K. Djongolov, R. D'Entremont, C. Kierans, L. Milovanovic, S. O'Hagan, S. Reeve, S. K. L. Sjue, S. J. Williams, S. S. Ntshangase. 2018-10-04. Precise branching ratio measurements in $^{19}$Ne beta decay and fundamental tests of the weak interaction. https://doi.org/10.1103/physrevc.99.065502

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